Subwavelength Diffractive Optical Elements for Generation of Terahertz Coherent Beams with Pre-Given Polarization State

Vladimir Pavelyev; Svetlana Khonina; Sergey Degtyarev; Konstantin Tukmakov; Anton Reshetnikov; Vasily Gerasimov; Natalya Osintseva; Boris Knyazev

doi:10.3390/s23031579

Subwavelength Diffractive Optical Elements for Generation of Terahertz Coherent Beams with Pre-Given Polarization State

Sensors (Basel). 2023 Feb 1;23(3):1579. doi: 10.3390/s23031579.

Authors

Vladimir Pavelyev^{1

2}, Svetlana Khonina^{1

2}, Sergey Degtyarev^{1

2}, Konstantin Tukmakov¹, Anton Reshetnikov¹, Vasily Gerasimov³, Natalya Osintseva³, Boris Knyazev³

Affiliations

¹ Samara National Research University, 443086 Samara, Russia.
² IPSI RAS-Branch of the FSRC "Crystallography and Photonics" RAS, 443001 Samara, Russia.
³ Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia.

Abstract

Coherent terahertz beams with radial polarization of the 1st, 2nd, and 3rd orders have been generated with the use of silicon subwavelength diffractive optical elements (DOEs). Silicon elements were fabricated by a technology similar to the technology used before for the fabrication of DOEs forming laser terahertz beams with pre-given mode content. The beam of the terahertz Novosibirsk Free Electron Laser was used as the illuminating beam. The experimental results are in good agreement with the results of the computer simulation.

Keywords: diffractive optical element; free electron laser; polarization state; terahertz laser beam.

Grants and funding

19-72-20202/Russian Science Foundation